we're here in chicago is obama country about as blue as bay area here. so makes sense this is where the president will spend tomorrow fight. today he had important places to be. the president started his last day on the catch yain in wis wisms a huge crowd estimated 18,000 cheered him on. >> you know i'll fight for you as hard as i know how. you know that will happen. >> the crucial state is ohio. he and mitt romney in columbus today. the president will finish up tonight in iowa. he started his first campaign four years ago. >> we know we've got more work to do. >> for mitt romney it's a win in florida, virginia and ohio. he needs to sweep all three. he will finish up tomorrow, watching returns in boston. >> do you want real change? >> president obama will be here in chicago tomorrow night workers preparing a hall that will hold as many as 18,000. four years ago we were in grant park. >> big stage said up. >> marty williams flew out hoping to see another quarter million people celebrating in grant park. >> it's cold. if i'd he i'd be prepared to watch hi